Beyond Music built its reputation on two packed nights at Vianden Castle; this Saturday it moves the rig to Bourscheid, a fortress that has watched over the Sauer valley since the eleventh century. Leo Lopez, Daymount, and DJ Ashik play from 7 p.m. to 1 a.m. under the ramparts. Tickets are 50 euros, over-21s only, sold through Resident Advisor.